Question about reprocessing the audio of a video file

[rolandc]

Hi,

I'm not sure where to post this so please relocate this post if you feel was wrongly placed...

I have recorded guitar videos and because of some noise from the amplifier I need to reprocess audio via audacity. Before, while on Windows XP, I used to desync audio from the video using Windows Movie Maker and simply synced back the new audio file.

But now I am on Linux and I have figured a way to achieve the same using Avidemux, but I need to know if that's the best way to go about it :
(by the way, the reason I am posting this here is that Avidemux's forum currently is not opened to registration)

- first save the video only
- then save the audio only
- reprocess the saved audio
- encode the saved video with the newly processed audio

Although this method sounds only logical, does Avidemux offer better functionnality to achieve this or is it the best way to go about it?

Thanks for your help
RC

[hech54]

I use AviDemux almost exclusively for replacing audio in music videos. You don't need to (re)encode the video, just use COPY for the video. What video codec are the original videos in?

[rolandc]

Thanks for the reply, sounds interesting, not having to re-encode is kinda nice. I use h264+mp3 (mp4) within vlc, does it make any difference for the process?

[rolandc]

also, I actually just took a look at what my window manager tells about the codecs used in those videos, in basic properties it says mpeg4, but in details properties, I have h264 for video, which is what I expected, but it says MPEG-1 Layer 2 (MP2) for the audio, while I thought it was would be mp3. Sample sound rate is 44100 though and bitrate 127....

[hech54]

also, I actually just took a look at what my window manager tells about the codecs used in those videos, in basic properties it says mpeg4, but in details properties, I have h264 for video, which is what I expected, but it says MPEG-1 Layer 2 (MP2) for the audio, while I thought it was would be mp3. Sample sound rate is 44100 though and bitrate 127....

My normal procedure is to simply drag and drop the video file into Goldwave, do my adjustments(no cuts), then SAVE AS a wav/wave/PCM file.
Open the video file in AviDemux, add the new PCM audio(it will replace the old audio) via AUDIO - MAIN TRACK - AUDIO SOURCE - EXTERNAL WAV (finding your newly created WAV file).
The settings will be:
The Video setting will be COPY
The Audio setting will be *your choice - these is an MP2 option there of course.
The Format setting will be MP4
Save As......enter your new file name WITH the .MP4 file type at the end.
Wait a few seconds and you are done.
If it takes longer than that you(probably) did something wrong.

[Cornucopia]

Recommend you do not use Window mgr to tell you about your media files, but instead use MediaInfo.

Scott

[hech54]

Recommend you do not use Window mgr to tell you about your media files, but instead use MediaInfo.

Scott

And get an OLD version. I use MediaInfo 0.7.35 and it works perfectly.

[rolandc]

Recommend you do not use Window mgr to tell you about your media files, but instead use MediaInfo.

Scott

Thanks, I have just installed MediaInfo but it tells me exactly what Gnome tells me too